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I'm surprised that no review has been written about those gems! The ER 4P/S is one of the best IEMs in the market value wise. They are made to last, they isolate like no other IEM and they have a unique flat frequency response which can be easily adjusted if you have a good equalizer or an integrated amp. The ER S will sound best when used with a powerful amp, it will provide an amazing sound...” --homeros8000

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When considering the wide range of IEMs out there I was fairly perplexed when it came to making a decision, it's the classic "headfiier's dilemma." Nobody wants to miss out. I've owned a number of headphones and the HF3s are your best bet for outstanding IEMs under $200, not to mention their customer service is unbelievably helpful (especially you Charlene!).
Bass/Fit: There...” --Racer24

“This is my first review on Head-Fi, so forgive me for my trip ups and lack of jargon, as I simply do not have the knowledge or experience to accurately describe everything I hear and feel.
That being said, I deliberated over my purchase of these IEM's for quite a while. For a few months, I had a toss-up between the GR07 BE, Sennheiser CX985, Rock-It R50 and RHA MA-750i. Any one of these...” --dazzerfong

“At the time of the review, the RHA T20 has not yet been released in the United States. This review was done as part of a demo tour done with the Head-Fi community. The MSRP at launch is expected to be $239 UDS. Here is a link to the RHA site
http://www.rha-audio.com/us/
Introduction
RHA has developed a following on Head-Fi with successful releases like the MA-750 and T10....” --Hisoundfi

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First off let me preface by stating that I bought these on a whim. I had read many things about Etymotic's penchant for accurate reproduction.
The initial impressions I got from these were a mixed bag. First off, I love the isolation factor, putting these on in the middle of a crowded communal area was like stepping into a library. I tried the various silicone...” --Exarch

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First off I want to thank RHA for selecting me as one of their 3 reviewers here on Head-fi. I really appreciate being selected out of so many quality reviewers that replied in the reviewers wanted thread. I also would like to thank the people who posted their recommendation for me. I was touched by those posts more than you realize, as the process of writing reviews can at times feel like I...” --dweaver

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I'd like to think RHA for sending me these earphones for review.
Along with the summary below, I have posted a Youtube video review of the MA350. If you like the video, check out my channel for more reviews :)
Summary
BUILD
The MA350 has an interesting build, with a reverse horn / funnel shape. This is actually the opposite of a horn...” --a_recording

“let's keep this short, simple and sweet-just like the earphones being reviewed.
Why are these things so good?? could it be the superb balance between lows, mids and highs? or the excellent isolation, that lets you enjoy your music at lower volumes while not skipping any of the details?? Are they deserving of the near-legendary status that has kept these phones relevant in today's $1000...” --dxps26

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These were my first real earphones, and I bought them entirely because they'd been spreading like a plague on a forum I used. Upon first hearing them I was disappointed, but over time they grew on me, and until upgrading to the ER4, they were a firm favourite. Some of my friends couldn't get the fuss, nor understand why anybody would spend a hundred bucks on iPod earphones, but then again...” --BBBS

“Many thanks to RHA Audio for providing this free review sample.
The MA600 is tuned as a V shape. For those who don't know what that means, a V shaped tuning means the treble and bass have been tuned to sound more forward and aggressive then the mids. End result, the mids tend to sound more laid back in comparison to the rest of the sound signature. Some good examples of gear, both...” --DigitalFreak